Auto-suture Device for Nasal Surgery - CAE Users自动缝合器鼻腔手术CAE用户.ppt

Auto-suturedevicefornasalsurgeryClient:Dr.BenjaminMarcusDepartmentofOtolaryngologyAdvisor:ProfessorTylerMarkYarmarkovich~LeaderJosephCabelka~CommunicatorJenniferWager~BSACThereseRollmann~BWIG

ProblemStatementDevelopdevicetoreducesuturingprocessinnasalsurgery(septoplasty)ReduceORcosts($60/min)Thedeviceshouldmimictheprocedurecurrentlyusedbythesurgeon

DesignConstraintsReducesuturingtime(lessthan10minutes)Autoclavableorone-timeuseDimensionsmustconformtothenoseCostupto$300fordisposable,$1500formultipleuse

Background:NoseSeptum:cartilagedividingnoseintotwochambers;3-5mmwideCartilageYoung’sModulus=10MPaMucousmembraneliningeachsideofseptumNostrilwidth:10mm-15mmFlexible

Background:SeptoplastyDeviatedseptumSeptumisseverelyshiftedfrommidlineCausesdifficultybreathing,sleeping

Background:SeptoplastyIncisionmadetoexposecaudalendofseptumCartilageexcisedtopreventoverridingCartilageswungintoalignment

Background:SutureSuturesCloseincisionStrong,non-toxicpolymerfiberAbsorbablePurse-stringsuturepatternContinuousCircularInverting

CurrentDeviceAutosuturedevicescurrentlyavailableforbowelsurgeryLargescaleEndostitchAutomaticNeedlePasser

MaterialsAutoclavableorone-timeuseLightweightandeasytohandleDurableifmultipleuseTitaniumCompositeStainlessSteelGrade420MedicalGradePlastic(PEEK)Density4.42g/cm37.75g/cm31.32g/cm3WorkingTemperature450°C400°C249°C

DesignI:MechanicalNeedlePasserNeedlepassedwithpulleysystemLockedintoplacebynotchededges

DesignI:MechanicalNeedlePasserProsMimicsprocedureManipulatedbysurgeonAdjustablenumberofsuturesConsManysmallpartsDifficulttomanufactureDifficulttoautoclaveRequiresdexterity

DesignII:ClampClampedoneithersideoftheseptumSutureismanuallyinsertedthroughraisedseptum

DesignIIProsEasytomanufactureCanbedisposableSafeConsNotadjustabletosizeofnoseNotautomatic

DesignIII:Magn